Operation By Lighting Switch

With the lighting switch in the 1ST or 2ND position (or if the auto light system is activated), the BCM (body control module) receives input signal requesting the parking, license plate, side marker and tail lamps to illuminate. This input signal is communicated to the IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines. The CPU (central processing unit) in the IPDM E/R controls the tail lamp relay coil, which when energized, directs power

Through IPDM E/R terminal 57
To front combination lamp LH and RH terminal 3
To license plate lamps terminal +
To rear combination lamp LH and RH terminal 3.

Ground is supplied

To front combination lamp LH and RH terminal 4 and
Through grounds E9, E15 and E24
To rear combination lamp LH terminal 1
Through grounds B7 and B19
To rear combination lamp RH terminal 1 and
To license plate lamps terminal -
Through grounds B117 and B132.

With power and ground supplied, the parking, license plate and tail lamps illuminate.